EP0564800B1 - Device for selective connection of one or several moulds for plastics treatment with a fluid or a pressurised gas - Google Patents

Device for selective connection of one or several moulds for plastics treatment with a fluid or a pressurised gas Download PDF

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Publication number
EP0564800B1
EP0564800B1 EP93103035A EP93103035A EP0564800B1 EP 0564800 B1 EP0564800 B1 EP 0564800B1 EP 93103035 A EP93103035 A EP 93103035A EP 93103035 A EP93103035 A EP 93103035A EP 0564800 B1 EP0564800 B1 EP 0564800B1
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EP
European Patent Office
Prior art keywords
way valve
outlet
connection
shut
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP93103035A
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German (de)
French (fr)
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EP0564800A1 (en
Inventor
Jean-Louis Delcroix
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/007—Tempering units for temperature control of moulds or cores, e.g. comprising heat exchangers, controlled valves, temperature-controlled circuits for fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/865—Heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/0083—Electrical or fluid connection systems therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86558—Plural noncommunicating flow paths
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86558—Plural noncommunicating flow paths
    • Y10T137/86566—Rotary plug
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87153—Plural noncommunicating flow paths
    • Y10T137/87161—With common valve operator

Definitions

  • the invention relates to a device for selectively applying one or more molds for plastic processing with a liquid or a pressurized gas according to the preamble of claim 1.
  • a device known from DE-A-2808139 is used to mold with steam heat or cool with cooling water.
  • Molds for plastics processing such as injection molds, blow molds or extrusion molds generally have to be kept at a certain temperature, which in injection molds and blow molds causes the inserted plasticized plastic to cool and thus solidify in order to remove the molded part from the mold as quickly as possible to be able to.
  • the temperature must be so high that the plastic completely fills the mold and does not "freeze" before the mold is completely filled.
  • the extrusion mold When extruding, the extrusion mold must generally be heated in order to be able to remove the extruded strand continuously and with a perfect surface and to cool it in a cooling bath.
  • connection on the molds as quick-release couplings which can be easily released and are designed such that no fluid can escape from the lines and the molds themselves when the coupling is released.
  • the invention has for its object to provide a device that allows a quick change of shapes to be achieved with a simple structure, without thereby in the Forms remaining fluid, there is a risk of corrosion and contamination.
  • a channel arrangement is provided for a connection between the connection for the liquid supply and the outlet of the first three-way valve element connected to the inlet of the mold, and between the one with the Outlet of the mold-connected inlet and the connection for a liquid discharge of the second three-way valve element in a first position of the coupled three-way valve elements, for a connection between the compressed gas connection and the outlet of the first one connected to the inlet of the mold Three-way valve elements as well as between the one with de In the outlet of the mold connected inlet and the outlet into the collecting container for liquid and compressed gas of the second Three-way valve elements in a second position of the coupled three-way valve elements and for blocking all connections, inputs and outputs on
  • the application of liquid to one or more forms can be achieved in the first stage, the liquid preferably being able to circulate in a closed system and, if appropriate, tempering in a known manner, ie. H. is cooled or heated.
  • the liquid circuit is separated from the mold and the liquid in the mold is expelled with a gas under pressure, usually with compressed air.
  • the expelled liquid is collected in a container, whereby the compressed air is passed through the mold until the mold and the lines are completely dry.
  • all connections, inputs and outputs are shut off, so that the shape can be detached from the three-way valve elements, preferably by means of simple quick couplings, and can be exchanged for another shape.
  • the device according to the invention can be arranged in the immediate vicinity of one or more molds in injection molding machines, blow molding machines or extrusion machines and is designed in such a way that no operating errors can occur.
  • the device according to the invention has only three valve positions on, an operating position with the mold exposed to a fluid, preferably water, an emptying position for pressurizing the mold with compressed air and a blocking position in which the mold or molds can be replaced.
  • the device according to the invention is particularly advantageous in all systems in which both the liquid inlet and the liquid outlet are under a certain pressure and therefore there is a risk that the lines will drain when the connection to a mold is released.
  • In systems operating in a closed circuit it must be avoided that liquid escapes and air enters, in order to avoid damage to the liquid circuit which can occur, in particular, on temperature control devices which may be used. With the device according to the invention, this requirement is met with certainty since air cannot enter the circuit in any position of the three-way valve elements.
  • the three-way valve elements can have rotatable shut-off parts coupled to one another, preferably in the form of coaxial, conical chicks. These chicks can be arranged in interconnected valve housings or in a uniform valve housing for both chicks.
  • Tapered chicks have the advantage that they can be made to seal well by grinding into their seat and that no undesired overlap of the openings occurs in intermediate positions. However, the two chicks must be separated are grinded from each other in their seats and require a certain spring preload to seal well.
  • the shut-off parts can also be designed as piston slide elements, which can be arranged axially parallel or coaxially to one another.
  • Piston spools are simply constructed and have a continuous bore with a coaxial arrangement of the piston spool elements, which can be produced easily and precisely.
  • the piston slide itself can also be edited very precisely, so that they can be guided in the corresponding bore without additional seals, but in this embodiment are susceptible to corrosion and wear due to abrasion carried by the fluid or the compressed gas, so that they are in this form are best suited when using oil as a fluid and filtered compressed air.
  • a mold 1 is shown connected to a pair of three-way valve elements 5, 6.
  • the form has an inlet 2 and an outlet 3, which are connected via quick couplings 4 to an outlet 11 of the first three-way valve element 5 and an inlet 20 of the second three-way valve element 6.
  • the three-way valve element 5 consists of a housing 8, which for the sake of simplicity is shown in FIG. 1 next to a housing 19 for the second three-way valve element 6.
  • This type of display was chosen to illustrate the way it works in the different positions.
  • the valve housings 8, 19 are arranged one above the other and connected to one another, e.g. B. screwed.
  • the valve housing 8 has a connection for a liquid supply, for. B. for water. Furthermore, a connection 10 for a compressed gas, for. B. compressed air.
  • a conical plug 12 is arranged centrally in the valve housing 8, to which a channel 13 leads from the connection 9, a channel 14 from the connection 10 and a channel 15 from the outlet 11.
  • the plug 12 has two channels 16, 17, of which the channel 16 in the position shown in FIGS. 1 and 2 establishes a connection between the water connection 9 and the inlet 2 of the mold 1 via the channels 13, 15 and the outlet 11 .
  • the second three-way valve element 6 is constructed accordingly and consists of a housing 19 with an inlet 20, which is connected to the outlet 3 of the mold 1 via the coupling 4, a connection 21 for the liquid discharge and an outlet 22, which opens into a collecting container 23.
  • a conical plug 24 is also arranged, which with the plug 12 by means of a coupling element 18, for. B. a hexagonal rod is rotatably coupled. In the position shown, the plug 24 is connected to the inlet 20 via a channel 25 and to the connection 21 for the liquid drainage via a channel 26 and a channel 28 in the plug 24.
  • Another channel 29 is only shown in dashed lines to indicate that this opens blindly in the position shown in FIGS. 1 and 2 on the wall of the conical seat of the plug 24. This also applies to the channel 17 shown in dashed lines in the plug 12 of the first three-way valve element 5.
  • the chicks 12, 24, which are coupled to one another in a rotationally fixed manner, can be rotated into three positions by means of a shaft 30 which is led out of the valve housing 8 and on which an actuating lever 31 is seated, of which the first position is shown in FIGS. 1 and 2, in which the mold 1 is supplied with water via the connection 9.
  • the water can flow out via the connection 21 and can be returned to the connection 9 in a closed circuit in a manner not shown, if necessary via a temperature control device (not shown).
  • the compressed air connection 10 and the outlet 22, which leads to the collecting container 23, are closed in the position shown in FIGS. 1 and 2.
  • the chicks 12, 24 are rotated by means of the actuating lever 31 and brought into the position shown in FIGS. 3 and 4. In This position results in a connection between the compressed air connection 10 and the outlet 11 of the first three-way valve element 5 via the channels 14, 15 in the valve housing 8 and the channel 17 in the conical plug 12.
  • the coupling of the chicks 12, 24 results in a connection between the inlet 20 and the outlet 22 of the second three-way valve element 6 via the channels 25, 27 in the valve housing 19 and the channel 29 in the plug 24.
  • compressed air is thus fed into the mold 1 and drives the water out of the mold.
  • This water is collected in the collecting container 23.
  • the position shown in FIGS. 3 and 4 is maintained until the mold has dried completely by the pressurized air.
  • the chicks 12, 24 are brought into the position shown in FIGS. 5 and 6, in which all channels 13 to 17 and 25 to 29 are blocked, so that the couplings 4 can be released and the mold 1 can be replaced.
  • the embodiment shown in FIG. 7, with regard to the three-way valve elements 7, 48 consists of a uniform valve housing 32 with a cylindrical bore 33, in which three piston slide parts 40, 41, 42 coupled via connecting elements 43, 44 of smaller diameter by means of O. -Ring seals 45 are guided sealed.
  • the valve housing 32 like the embodiment according to FIGS. 1 to 6, has a connection 9 for the liquid supply, a pressurized gas connection 10, an outlet 11, an inlet 20, a connection 21 for the liquid discharge and an outlet 22 opening into a collecting container 23 .
  • the outlet 11 is connected via a distributor 46 to four molds 1 to show that a three-way valve element pair 5, 6 or 7, 48 is not only with one mold 1, but also with several molds 1 connects.
  • a radial bore 34 leads from the connection 9 to the cylindrical bore 33. Axially spaced from this, a radial bore 35 leads from the compressed gas connection 10 to the cylindrical bore 33.
  • a further radial bore 36 is arranged approximately centrally between the bore 34, 35 in the housing 32 and leads from the cylindrical bore 32 to the outlet 11.
  • the second three-way valve element 48 is through a corresponding radial bore 37 corresponding to the inlet 20, a radial bore 38 corresponding to the connection 21 for the drainage, a radial bore 39 corresponding to the outlet 22 and adjacent piston slide parts 41, 42 formed. Between the piston slide parts 40, 41 and 41, 42, the connecting elements 43, 44 are arranged, which leave an annular space.
  • the distance between the piston slide parts 40, 41, 42 and the adjacent O-ring seals 45 is selected so that in the position shown in FIG. 7 the radial bores 34, 35, 38, 39 are covered by the piston slide parts 40, 41, 42, while the bores 36, 37 open in the area of the annular space at the connecting elements 43, 44. It can be seen that in the position shown there is no connection between the radial bores 34 to 39 in the valve housing 32, which corresponds to the third position shown in FIGS. 5 and 6, in which all channels are blocked, so that the couplings 4 in allow the lines 2, 3 of the molds 1 to be replaced in order to replace one or more molds if all the water has previously been expelled from the molds 1 and the distributors 46, 47 by means of compressed air.
  • the piston slide parts 40, 41 with the connecting elements 43, 44 are in a position shifted so far to the right that the piston slide parts 40, 41 are located to the right of the radial bores 34, 38, so that a connection from the connection 9 to Output 11 via the bore 34, the annular space around the connecting element 43 and the bore 36 and between the inlet 20 and the connection 21 for the liquid drainage via the radial bore 37, the annular space around the connecting element 44 and the radial bore 38 results.
  • the water entering port 9 can flow freely through molds 11 and returns to port 21, from where it is either returned to port 9 into a tank, into a drain or in a closed circuit.
  • connection 10 In order to drive the water out of the molds, compressed air is supplied via the connection 10 by displacing the piston slide 40 to 44 to the left such that there is a connection between the radial bores 35, 36 via the annular space in the region of the connecting element 43 and a connection between the radial bores 37, 39 through the annular space in the area of the connecting element 44.
  • the liquid is expelled from the molds 1 by means of the compressed air supplied via the connection 10 and flows via the outlet 22 into the indicated collecting container 23.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

Die Erfindung betrifft eine Einrichtung zum wahlweisen Beaufschlagen von einer oder mehreren Formen für die Kunststoffverarbeitung mit einer Flüssigkeit oder einem unter Druck stehenden Gas nach dem Oberbegriff des Anspruchs 1. Eine derartige aus der DE-A-2808139 bekannte Einrichtung dient dazu, Formen mit Dampf zu beheizen oder mit Kühlwasser zu kühlen.The invention relates to a device for selectively applying one or more molds for plastic processing with a liquid or a pressurized gas according to the preamble of claim 1. Such a device known from DE-A-2808139 is used to mold with steam heat or cool with cooling water.

Formen für die Kunststoffverarbeitung wie Spritzgußformen, Blasformen oder Extrusionsformen müssen in der Regel auf einer bestimmten Temperatur gehalten werden, die bei Spritzguß- und Blasformen ein Abkühlen des eingeführten, plastifizierten Kunststoffs und damit dessen Verfestigung bewirkt, um das geformte Teil möglichst schnell aus der Form entnehmen zu können. Die Temperatur muß so hoch sein, daß der Kunststoff die Form vollständig ausfüllt und nicht vor dem vollständigen Ausfüllen der Form "einfriert". Beim Extrudieren muß die Extrusionsform in der Regel geheizt werden, um den extrudierten Strang kontinuierlich und mit einwandfreier Oberfläche abzuführen und in einem Kühlbad abkühlen zu können. Um die sehr teuren Kunststoffverarbeitungsmaschinen möglichst effektiv einsetzen zu können, wird des weiteren gefordert, daß sich die Formen möglichst schnell auswechseln lassen, um beim Einrichten eines anderen Spritzguß- oder Blasformteils oder eines anderen Extrusionsprofils möglichst kurze Stillstandszeiten der Maschinen hinnehmen zu müssen.Molds for plastics processing such as injection molds, blow molds or extrusion molds generally have to be kept at a certain temperature, which in injection molds and blow molds causes the inserted plasticized plastic to cool and thus solidify in order to remove the molded part from the mold as quickly as possible to be able to. The temperature must be so high that the plastic completely fills the mold and does not "freeze" before the mold is completely filled. When extruding, the extrusion mold must generally be heated in order to be able to remove the extruded strand continuously and with a perfect surface and to cool it in a cooling bath. To make the very expensive plastic processing machines as effective as possible To be able to use, it is also required that the molds can be replaced as quickly as possible, so that the machine can be kept to a minimum when setting up another injection molded or blow molded part or another extrusion profile.

Zu diesem Zweck ist es bekannt, die Anschlüsse an den Formen als Schnellkupplungen auszubilden, die sich leicht lösen lassen und so gestaltet sind, daß beim Lösen der Kupplung keine Fluid aus den Leitungen und den Formen selber austreten kann.For this purpose, it is known to form the connections on the molds as quick-release couplings which can be easily released and are designed such that no fluid can escape from the lines and the molds themselves when the coupling is released.

Da die Formen in der Regel mit Wasser gekühlt werden, kann es vorkommen, daß das Wasser über längere Zeit in den Hohlräumen der Formen verbleibt und dort zu Korrosion führt. Des weiteren sind derartige Schnellkupplungen teuer und störanfällig, so daß einfache Schnellkupplungen ohne automatischen Verschluß beim Lösen bevorzugt werden, jedoch läuft in diesem Fall beim Trennen der Kupplung das Fluid aus den Formen aus und führt zu Verschmutzungen und Korrosion an der Formaußenseite und, was sehr viel schwerwiegender ist, in den Formhohlräumen.Since the molds are usually cooled with water, it can happen that the water remains in the cavities of the molds for a long time and there leads to corrosion. Furthermore, such quick couplings are expensive and prone to failure, so that simple quick couplings without automatic closure are preferred when loosening, but in this case the fluid leaks out of the molds when the coupling is disconnected and leads to dirt and corrosion on the outside of the mold and what is very much is more serious in the mold cavities.

Wichtig ist des weiteren, um eine hohe Ausnutzung der Maschinen zu erreichen, daß die Formen sehr schnell auf die gewünschte Temperatur gelangen.It is also important, in order to achieve high utilization of the machines, that the molds reach the desired temperature very quickly.

Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung zu schaffen, die bei einfachen Aufbau ein schnelles Auswechseln von Formen zu erreichen gestattet, ohne daß dabei durch in den Formen verbleibendes Fluid Korrosions- und Verschmutzungsgefahr besteht.The invention has for its object to provide a device that allows a quick change of shapes to be achieved with a simple structure, without thereby in the Forms remaining fluid, there is a risk of corrosion and contamination.

Ausgehend von dieser Aufgabenstellung wird bei einer Einrichtung der eingangs erwähnten Art vorgeschlagen, daß erfindungsgemäß an einer oder mehreren Formen mit wenigstens einem Paar Drei-Wege-Ventil-Elementen miteinander zwangsbewegungsgekuppelte Absperrteile des Paares Drei-Wege-Ventil-Elemente vorhanden sind, und im Ventilgehäuse und dem beweglichen Absperrteil der beiden gekuppelten Drei-Wege-Ventil-Elemente eine Kanalanordnung vorgesehen ist für eine Verbindung zwischen dem Anschluß für die Flüssigkeitszufuhr und dem mit dem Zulauf der Form verbundenen Ausgang des ersten Drei-Wege-Ventil-Elements sowie zwischen dem mit dem Ablauf der Form verbundenen Eingang und dem Anschluß für eine Flüssigkeitsableitung des zweiten Drei-Wege-Ventil-Elements in einer ersten Stellung der gekuppelten Drei-Wege-Ventil-Elemente, für eine Verbindung zwischen Druckgasanschluß und dem mit dem Zulauf der Form verbundenen Ausgang des ersten Drei-Wege-Ventil-Elements sowie zwischen dem mit dem Ablauf der Form verbundenen Eingang und dem in den Auffangbehälter mündenden Ausgang für Flüssigkeit und Druckgas des zweiten Drei-Wege-Ventil-Elements in einer zweiten Stellung der gekuppelten Drei-Wege-Ventil-Elemente und für eine Sperrung sämtlicher Anschlüsse, Eingänge und Ausgänge an den beiden Drei-Wege-Ventil-Elementen in einer dritten Stellung der beiden gekuppelten Drei-Wege-Ventil-Elemente.Based on this task, it is proposed in a device of the type mentioned that according to the invention on one or more molds with at least one pair of three-way valve elements, shut-off parts of the pair of three-way valve elements coupled to one another are present, and in the valve housing and the movable shut-off part of the two coupled three-way valve elements, a channel arrangement is provided for a connection between the connection for the liquid supply and the outlet of the first three-way valve element connected to the inlet of the mold, and between the one with the Outlet of the mold-connected inlet and the connection for a liquid discharge of the second three-way valve element in a first position of the coupled three-way valve elements, for a connection between the compressed gas connection and the outlet of the first one connected to the inlet of the mold Three-way valve elements as well as between the one with de In the outlet of the mold connected inlet and the outlet into the collecting container for liquid and compressed gas of the second Three-way valve elements in a second position of the coupled three-way valve elements and for blocking all connections, inputs and outputs on the two three-way valve elements in a third position of the two coupled three-way Valve elements.

Mit dieser Einrichtung läßt sich in der ersten Stufe die Beaufschlagung einer oder mehrerer Formen mit Flüssigkeit erreichen, wobei die Flüssigkeit vorzugsweise in einem geschlossenen System umlaufen kann und dabei gegebenenfalls in bekannter Weise temperiert, d. h. abgekühlt oder erwärmt wird. In der zweiten Stellung wird der Flüssigkeitskreislauf von der Form getrennt und die in der Form befindliche Flüssigkeit mit einem unter Druck stehenden Gas, in der Regel mit Druckluft ausgetrieben. Die ausgetriebene Flüssigkeit wird in einem Behälter aufgefangen, wobei die Druckluft solange durch die Form geleitet wird, bis die Form und die Leitungen vollständig trocken sind. Danach werden sämtliche Anschlüsse, Eingänge und Ausgänge abgesperrt, so daß sich die Form von den Drei-Wege-Ventil-Elementen lösen läßt, vorzugsweise mittels einfacher Schnellkupplungen, und gegen eine andere Form ausgetauscht werden kann.With this device, the application of liquid to one or more forms can be achieved in the first stage, the liquid preferably being able to circulate in a closed system and, if appropriate, tempering in a known manner, ie. H. is cooled or heated. In the second position, the liquid circuit is separated from the mold and the liquid in the mold is expelled with a gas under pressure, usually with compressed air. The expelled liquid is collected in a container, whereby the compressed air is passed through the mold until the mold and the lines are completely dry. Then all connections, inputs and outputs are shut off, so that the shape can be detached from the three-way valve elements, preferably by means of simple quick couplings, and can be exchanged for another shape.

Die erfindungsgemäße Einrichtung läßt sich unmittelbar in der Nähe einer oder mehrerer Formen in Spritzgießmaschinen, Blasformmaschinen oder Extrusionsmaschinen anordnen und ist so gestaltet, daß keine Bedienungsfehler auftreten können. Die erfindungsgemäße Einrichtung weist nur drei Ventilstellungen auf, eine Betriebsstellung mit Beaufschlagung der Form mit einem Fluid, vorzugweise Wasser, eine Entleerungsstellung zum Beaufschlagen der Form mit Druckluft und eine Sperrstellung, in der sich die Form bzw. Formen auswechseln läßt bzw. lassen.The device according to the invention can be arranged in the immediate vicinity of one or more molds in injection molding machines, blow molding machines or extrusion machines and is designed in such a way that no operating errors can occur. The device according to the invention has only three valve positions on, an operating position with the mold exposed to a fluid, preferably water, an emptying position for pressurizing the mold with compressed air and a blocking position in which the mold or molds can be replaced.

Die erfindungsgemäße Einrichtung ist besonders vorteilhaft bei allen Systemen, bei denen sowohl der Flüssigkeitszulauf als auch der Flüssigkeitsablauf unter einem gewissen Druck stehen und daher die Gefahr besteht, daß die Leitungen leerlaufen, wenn die Verbindung zu einer Form gelöst wird. Bei im geschlossenen Kreislauf arbeitenden Systemen muß vermieden werden, daß Flüssigkeit austritt und Luft eintritt, um Schäden im Flüssigkeitskreislauf zu vermeiden, die insbesondere an dabei gegebenenfalls eingesetzten Temperiergeräten auftreten können. Mit der erfindungsgemäßen Einrichtung wird diese Forderung mit Sicherheit erfüllt, da in keiner Stellung der Drei-Wege-Ventil-Elemente Luft in den Kreislauf eintreten kann.The device according to the invention is particularly advantageous in all systems in which both the liquid inlet and the liquid outlet are under a certain pressure and therefore there is a risk that the lines will drain when the connection to a mold is released. In systems operating in a closed circuit, it must be avoided that liquid escapes and air enters, in order to avoid damage to the liquid circuit which can occur, in particular, on temperature control devices which may be used. With the device according to the invention, this requirement is met with certainty since air cannot enter the circuit in any position of the three-way valve elements.

Die Drei-Wege-Ventil-Elemente können miteinander gekuppelte, drehbare Absperrteile, vorzugsweise in Form von koaxialen, kegeligen Küken aufweisen. Diese Küken können in miteinander verbundenen Ventilgehäusen oder auch in einem einheitlichen Ventilgehäuse für beide Küken angeordnet sein.The three-way valve elements can have rotatable shut-off parts coupled to one another, preferably in the form of coaxial, conical chicks. These chicks can be arranged in interconnected valve housings or in a uniform valve housing for both chicks.

Kegelige Küken bieten den Vorteil, daß sie durch Einschleifen in ihren Sitz gut dichtend hergestellt werden können und daß in Zwischenstellungen keinerlei unerwünschte Überschneidungen der Öffnungen eintreten. Allerdings müssen die beiden Küken getrennt voneinander in ihre Sitze eingeschliffen werden und erfordern eine gewisse Federvorspannung, um gut abzudichten.Tapered chicks have the advantage that they can be made to seal well by grinding into their seat and that no undesired overlap of the openings occurs in intermediate positions. However, the two chicks must be separated are grinded from each other in their seats and require a certain spring preload to seal well.

Die Absperrteile lassen sich auch als Kolbenschieberelemente ausbilden, die achsparallel oder koaxial zueinander angeordnet sein können. Kolbenschieber sind einfach aufgebaut und weisen eine durchgehende Bohrung bei koaxialer Anordnung der Kolbenschieberelemente auf, die sich einfach und genau herstellen läßt. Die Kolbenschieber selber lassen sich ebenfalls sehr genau bearbeiten, so daß sie ohne zusätzliche Dichtungen in der entsprechenden Bohrung geführt sein können, sind jedoch in dieser Ausführungsform anfällig gegen Korrosion und Verschleiß durch vom Fluid oder dem Druckgas mitgeführten Abrieb, so daß sie in dieser Form am besten bei Verwendung von Öl als Fluid und von gefilterter Druckluft geeignet sind.The shut-off parts can also be designed as piston slide elements, which can be arranged axially parallel or coaxially to one another. Piston spools are simply constructed and have a continuous bore with a coaxial arrangement of the piston spool elements, which can be produced easily and precisely. The piston slide itself can also be edited very precisely, so that they can be guided in the corresponding bore without additional seals, but in this embodiment are susceptible to corrosion and wear due to abrasion carried by the fluid or the compressed gas, so that they are in this form are best suited when using oil as a fluid and filtered compressed air.

Werden zusätzliche Dichtelemente an den Kolbenschieberelementen eingesetzt, sinkt die Empfindlichkeit gegen Korrosion und Verschleiß an den Kolbenschieberelementen selber, jedoch müssen die Dichtelemente von Zeit zu Zeit ausgetauscht werden.If additional sealing elements are used on the piston valve elements, the sensitivity to corrosion and wear on the piston valve elements themselves decreases, but the sealing elements must be replaced from time to time.

Die Erfindung wird nachstehend anhand zweier Beispiele des näheren erläutert. In der Zeichnung zeigen:

Fig. 1
eine schematische Draufsicht im Schnitt mit einem Paar gekuppelter Drei-Wege-Ventil-Elemente in der ersten Stellung,
Fig. 2
eine Seitenansicht der Drei-Wege-Ventil-Elemente in der ersten Stellung,
Fig. 3
eine schematische Draufsicht im Schnitt mit einem Paar Drei-Wege-Ventil-Elementen in der zweiten Stellung,
Fig. 4
eine Seitenansicht der Drei-Wege-Ventil-Elemente in der zweiten Stellung,
Fig. 5
eine schematische Draufsicht im Schnitt mit einem Paar Drei-Wege-Ventil-Elementen in der dritten Stellung,
Fig. 6
eine Seitenansicht der Drei-Wege-Ventil-Elemente in der dritten Stellung und
Fig. 7
eine Schnittansicht eines Paares Drei-Wege-Ventil-Elementen gemäß einer anderen Ausführungsform in der dritten Stellung.
The invention is explained in more detail below with the aid of two examples. The drawing shows:
Fig. 1
1 shows a schematic plan view in section with a pair of coupled three-way valve elements in the first position,
Fig. 2
a side view of the three-way valve elements in the first position,
Fig. 3
a schematic plan view in section with a pair of three-way valve elements in the second position,
Fig. 4
a side view of the three-way valve elements in the second position,
Fig. 5
a schematic plan view in section with a pair of three-way valve elements in the third position,
Fig. 6
a side view of the three-way valve elements in the third position and
Fig. 7
a sectional view of a pair of three-way valve elements according to another embodiment in the third position.

In den Fig. 1 bis 6 ist eine Form 1 mit einem Paar Drei-Wege-Ventil-Elementen 5, 6 verbunden gezeigt. Die Form weist einen Zulauf 2 und einen Ablauf 3 auf, die über Schnellkupplungen 4 mit einem Ausgang 11 des ersten Drei-Wege-Ventil-Elements 5 und einem Eingang 20 des zweiten Drei-Wege-Ventil-Elements 6 verbunden sind.1 to 6, a mold 1 is shown connected to a pair of three-way valve elements 5, 6. The form has an inlet 2 and an outlet 3, which are connected via quick couplings 4 to an outlet 11 of the first three-way valve element 5 and an inlet 20 of the second three-way valve element 6.

Das Drei-Wege-Ventil-Element 5 besteht aus einem Gehäuse 8, das in Fig. 1 der Einfachheit halber neben einem Gehäuse 19 für das zweite Drei-Wege-Ventil-Element 6 gezeichnet dargestellt ist. Diese Darstellungsart wurde gewählt, um die Funktionsweise in den verschiedenen Stellungen zu verdeutlichen. Tatsächlich sind die Ventilgehäuse 8, 19, wie aus Fig. 2 ersichtlich, übereinander angeordnet und miteinander verbunden, z. B. verschraubt. Es ist jedoch auch möglich, die Ventilgehäuse 8, 19 einstückig herzustellen, wenn eine Montagemöglichkeit für alle Teile der Drei-Wege-Ventil-Elemente 5, 6 gewährleistet ist.The three-way valve element 5 consists of a housing 8, which for the sake of simplicity is shown in FIG. 1 next to a housing 19 for the second three-way valve element 6. This type of display was chosen to illustrate the way it works in the different positions. In fact, as can be seen in FIG. 2, the valve housings 8, 19 are arranged one above the other and connected to one another, e.g. B. screwed. However, it is also possible to manufacture the valve housings 8, 19 in one piece if an assembly possibility for all parts of the three-way valve elements 5, 6 is guaranteed.

Das Ventilgehäuse 8 weist einen Anschluß für eine Flüssigkeitszufuhr auf, z. B. für Wasser. Des weiteren ist ein Anschluß 10 für ein Druckgas, z. B. Druckluft, vorgesehen. Zentrisch im Ventilgehäuse 8 ist ein konisches Küken 12 angeordnet, zu dem ein Kanal 13 vom Anschluß 9, ein Kanal 14 vom Anschluß 10 und ein Kanal 15 vom Ausgang 11 führen. Das Küken 12 weist zwei Kanäle 16, 17 auf, von denen der Kanal 16 in der in Fig. 1 und 2 dargestellten Stellung eine Verbindung zwischen dem Wasseranschluß 9 und dem Zulauf 2 der Form 1 über die Kanäle 13, 15 und den Ausgang 11 herstellt.The valve housing 8 has a connection for a liquid supply, for. B. for water. Furthermore, a connection 10 for a compressed gas, for. B. compressed air. A conical plug 12 is arranged centrally in the valve housing 8, to which a channel 13 leads from the connection 9, a channel 14 from the connection 10 and a channel 15 from the outlet 11. The plug 12 has two channels 16, 17, of which the channel 16 in the position shown in FIGS. 1 and 2 establishes a connection between the water connection 9 and the inlet 2 of the mold 1 via the channels 13, 15 and the outlet 11 .

Das zweite Drei-Wege-Ventil-Element 6 ist entsprechend aufgebaut und besteht aus einem Gehäuse 19 mit einem Eingang 20, der über die Kupplung 4 mit dem Ablauf 3 der Form 1 verbunden ist, einem Anschluß 21 für die Flüssigkeitsableitung und einem Ausgang 22, der in einem Auffangbehälter 23 mündet. Im Ventilgehäuse 19 ist ebenfalls ein konisches Küken 24 angeordnet, das mit dem Küken 12 mittels eines Kupplungselements 18, z. B. einer Sechskantstange, drehfest gekuppelt ist. Das Küken 24 ist in der dargestellten Stellung mit dem Eingang 20 über einen Kanal 25 und mit dem Anschluß 21 für die Flüssigkeitsableitung über einen Kanal 26 und einen Kanal 28 im Küken 24 verbunden.The second three-way valve element 6 is constructed accordingly and consists of a housing 19 with an inlet 20, which is connected to the outlet 3 of the mold 1 via the coupling 4, a connection 21 for the liquid discharge and an outlet 22, which opens into a collecting container 23. In the valve housing 19, a conical plug 24 is also arranged, which with the plug 12 by means of a coupling element 18, for. B. a hexagonal rod is rotatably coupled. In the position shown, the plug 24 is connected to the inlet 20 via a channel 25 and to the connection 21 for the liquid drainage via a channel 26 and a channel 28 in the plug 24.

Ein weiterer Kanal 29 ist nur gestrichelt dargestellt, um anzudeuten, daß dieser in der in Fig. 1 und 2 dargestellten Stellung blind an der Wandung des kegeligen Sitzes des Kükens 24 mündet. Dies gilt auch für den gestrichelt dargestellten Kanal 17 im Küken 12 des ersten Drei-Wege-Ventil-Elements 5.Another channel 29 is only shown in dashed lines to indicate that this opens blindly in the position shown in FIGS. 1 and 2 on the wall of the conical seat of the plug 24. This also applies to the channel 17 shown in dashed lines in the plug 12 of the first three-way valve element 5.

Die miteinander drehfest gekuppelten Küken 12, 24 lassen sich mittels einer aus dem Ventilgehäuse 8 herausgeführten Welle 30 auf der ein Betätigungshebel 31 sitzt, in drei Stellungen drehen, von denen in Fig. 1 und 2 die erste Stellung dargestellt ist, in der die Form 1 mit Wasser über den Anschluß 9 beaufschlagt ist. Das Wasser kann über den Anschluß 21 abfließen und in nicht dargestellter Weise in einem geschlossenen Kreislauf gegebenenfalls über ein nicht dargestelltes Temperiergerät zum Anschluß 9 zurückgeführt werden. Der Druckluftanschluß 10 und der Ausgang 22, der zum Auffangbehälter 23 führt, sind in der in Fig. 1 und 2 dargestellten Stellung verschlossen.The chicks 12, 24, which are coupled to one another in a rotationally fixed manner, can be rotated into three positions by means of a shaft 30 which is led out of the valve housing 8 and on which an actuating lever 31 is seated, of which the first position is shown in FIGS. 1 and 2, in which the mold 1 is supplied with water via the connection 9. The water can flow out via the connection 21 and can be returned to the connection 9 in a closed circuit in a manner not shown, if necessary via a temperature control device (not shown). The compressed air connection 10 and the outlet 22, which leads to the collecting container 23, are closed in the position shown in FIGS. 1 and 2.

Soll die Form 1 gegen eine andere Form ausgewechselt werden, werden die Küken 12, 24 mittels des Betätigungshebels 31 gedreht und in die in Fig. 3 und 4 dargestellte Stellung gebracht. In dieser Stellung ergibt sich eine Verbindung zwischen dem Druckluftanschluß 10 und dem Ausgang 11 des ersten Drei-Wege-Ventil-Elements 5 über die Kanäle 14, 15 im Ventilgehäuse 8 und den Kanal 17 im konischen Küken 12.If the mold 1 is to be exchanged for another mold, the chicks 12, 24 are rotated by means of the actuating lever 31 and brought into the position shown in FIGS. 3 and 4. In This position results in a connection between the compressed air connection 10 and the outlet 11 of the first three-way valve element 5 via the channels 14, 15 in the valve housing 8 and the channel 17 in the conical plug 12.

Des weiteren ergibt sich durch die Kupplung der Küken 12, 24 eine Verbindung zwischen dem Eingang 20 und dem Ausgang 22 des zweiten Drei-Wege-Ventil-Elements 6 über die Kanäle 25, 27 im Ventilgehäuse 19 und den Kanal 29 im Küken 24. In dieser Stellung wird somit Druckluft in die Form 1 geleitet und treibt das Wasser aus der Form aus. Dieses Wasser wird im Auffangbehälter 23 aufgefangen. Die in Fig. 3 und 4 dargestellte Stellung wird solange beibehalten, bis die Form durch die Druckluftbeaufschlagung vollständig getrocknet ist. Hiernach werden die Küken 12, 24 in die in Fig. 5 und 6 dargestellte Stellung gebracht, in der sämtliche Kanäle 13 bis 17 und 25 bis 29 gesperrt sind, so daß sich die Kupplungen 4 lösen lassen und die Form 1 ausgewechselt werden kann. Nachdem eine neue Form 1 über die Kupplungen 4 mit den Drei-Wege-Ventil-Elementen 5, 6 gekuppelt ist, werden die Küken 12, 24 mittels des Betätigungshebels 31 wieder in die erste in Fig. 1 und 2 dargestellte Stellung zurückgeführt, woraufhin die neue Form 1 mit Wasser beaufschlagt wird.Furthermore, the coupling of the chicks 12, 24 results in a connection between the inlet 20 and the outlet 22 of the second three-way valve element 6 via the channels 25, 27 in the valve housing 19 and the channel 29 in the plug 24. In In this position, compressed air is thus fed into the mold 1 and drives the water out of the mold. This water is collected in the collecting container 23. The position shown in FIGS. 3 and 4 is maintained until the mold has dried completely by the pressurized air. Thereafter, the chicks 12, 24 are brought into the position shown in FIGS. 5 and 6, in which all channels 13 to 17 and 25 to 29 are blocked, so that the couplings 4 can be released and the mold 1 can be replaced. After a new mold 1 is coupled via the couplings 4 with the three-way valve elements 5, 6, the chicks 12, 24 are returned to the first position shown in FIGS. 1 and 2 by means of the actuating lever 31, whereupon the new Form 1 is charged with water.

Es ist ersichtlich, daß sich ein Formwechsel mit der erfindungsgemäßen Einrichtung auf einfache Weise und schnell bewerkstelligen läßt und daß dabei keine Gefahr besteht, daß unnötig Wasser aus den Leitungen ausläuft und vergeudet wird, daß unnötig Druckluft verbraucht wird oder daß stromauf von den Drei-Wege-Ventil-Elementen 5, 6 angeordnete Vorrichtungen Schaden erleiden. Bedienungsfehler können bei der erfindungsgemäßen Einrichtung nicht vorkommen.It can be seen that a change of shape can be carried out quickly and easily with the device according to the invention and that there is no risk that water will unnecessarily leak from the pipes and be wasted. that unnecessary compressed air is consumed or that devices arranged upstream of the three-way valve elements 5, 6 are damaged. Operating errors cannot occur in the device according to the invention.

Die in Fig. 7 dargestellte Ausführungsform besteht hinsichtlich der Drei-Wege-Ventil-Elemente 7, 48 aus einem einheitlichen Ventilgehäuse 32 mit einer zylindrischen Bohrung 33, in der drei über Verbindungselemente 43, 44 kleineren Durchmessers gekuppelte Kolbenschieberteile 40, 41, 42 mittels O-Ring-Dichtungen 45 abgedichtet geführt sind. Das Ventilgehäuse 32 weist, wie die Ausführungsform gemäß Fig. 1 bis 6, einen Anschluß 9 für die Flüssigkeitszufuhr, einen Druckgasanschluß 10, einen Ausgang 11, einen Eingang 20, einen Anschluß 21 für die Flüssigkeitsableitung und einen in einen Auffangbehälter 23 mündenden Ausgang 22 auf. Der Ausgang 11 ist über einen Verteiler 46 mit vier Formen 1 verbunden ist, um darzustellen, daS sich ein Drei-Wege-Ventil-Elementen-Paar 5, 6 bzw. 7, 48 nicht nur mit einer Form 1, sondern auch mit mehreren Formen 1 verbinden läßt.The embodiment shown in FIG. 7, with regard to the three-way valve elements 7, 48, consists of a uniform valve housing 32 with a cylindrical bore 33, in which three piston slide parts 40, 41, 42 coupled via connecting elements 43, 44 of smaller diameter by means of O. -Ring seals 45 are guided sealed. The valve housing 32, like the embodiment according to FIGS. 1 to 6, has a connection 9 for the liquid supply, a pressurized gas connection 10, an outlet 11, an inlet 20, a connection 21 for the liquid discharge and an outlet 22 opening into a collecting container 23 . The outlet 11 is connected via a distributor 46 to four molds 1 to show that a three-way valve element pair 5, 6 or 7, 48 is not only with one mold 1, but also with several molds 1 connects.

Von dem Anschluß 9 führt eine radiale Bohrung 34 zur zylindrischen Bohrung 33. Axial beabstandet dazu führt vom Druckgasanschluß 10 eine radiale Bohrung 35 zu der zylindrischen Bohrung 33. Eine weitere radiale Bohrung 36 ist etwa mittig zwischen den Bohrung 34, 35 im Gehäuse 32 angeordnet und führt von der zylindrischen Bohrung 32 zu dem Ausgang 11. Diese radialen Bohrungen 34, 35, 36 bilden in Verbindung mit benachbarten Kolbenschieberteilen 40, 41 das erste Drei-Wege-Ventil-Element 7.A radial bore 34 leads from the connection 9 to the cylindrical bore 33. Axially spaced from this, a radial bore 35 leads from the compressed gas connection 10 to the cylindrical bore 33. A further radial bore 36 is arranged approximately centrally between the bore 34, 35 in the housing 32 and leads from the cylindrical bore 32 to the outlet 11. These radial bores 34, 35, 36 form in connection with adjacent piston slide parts 40, 41 the first three-way valve element 7.

Das zweite Drei-Wege-Ventil-Element 48 wird durch eine entsprechende mit dem Eingang 20 korrespondierende radiale Bohrung 37, eine mit dem Anschluß 21 für die Flüssigkeitsableitung korrespondierende radiale Bohrung 38, eine mit dem Ausgang 22 korrespondierende radiale Bohrung 39 und benachbarte Kolbenschieberteile 41, 42 gebildet. Zwischen den Kolbenschieberteilen 40, 41 sowie 41, 42 sind jeweils die Verbindungselemente 43, 44 angeordnet, die einen Ringraum freilassen.The second three-way valve element 48 is through a corresponding radial bore 37 corresponding to the inlet 20, a radial bore 38 corresponding to the connection 21 for the drainage, a radial bore 39 corresponding to the outlet 22 and adjacent piston slide parts 41, 42 formed. Between the piston slide parts 40, 41 and 41, 42, the connecting elements 43, 44 are arranged, which leave an annular space.

Der Abstand der Kolbenschieberteile 40, 41, 42 und der benachbarten O-Ringdichtungen 45 ist so gewählt, daß in der in Fig. 7 dargestellten Stellung die radialen Bohrungen 34, 35, 38, 39 von den Kolbenschieberteilen 40, 41, 42 überdeckt werden, während die Bohrungen 36, 37 im Bereich des Ringraums bei den Verbindungselementen 43, 44 münden. Es ist ersichtlich, daß in der dargestellten Stellung keinerlei Verbindung zwischen den radialen Bohrungen 34 bis 39 im Ventilgehäuse 32 besteht, was der in Fig. 5 und 6 dargestellten dritten Stellung entspricht, in der alle Kanäle abgesperrt sind, so daß sich die Kupplungen 4 in den Leitungen 2, 3 der Formen 1 lösen lassen, um eine oder mehrere Formen auszuwechseln, wenn vorher mittels Druckluft alles Wasser aus den Formen 1 und den Verteilern 46, 47 ausgetrieben wurde.The distance between the piston slide parts 40, 41, 42 and the adjacent O-ring seals 45 is selected so that in the position shown in FIG. 7 the radial bores 34, 35, 38, 39 are covered by the piston slide parts 40, 41, 42, while the bores 36, 37 open in the area of the annular space at the connecting elements 43, 44. It can be seen that in the position shown there is no connection between the radial bores 34 to 39 in the valve housing 32, which corresponds to the third position shown in FIGS. 5 and 6, in which all channels are blocked, so that the couplings 4 in allow the lines 2, 3 of the molds 1 to be replaced in order to replace one or more molds if all the water has previously been expelled from the molds 1 and the distributors 46, 47 by means of compressed air.

In der Betriebsstellung befinden sich die Kolbenschieberteile 40, 41 mit den Verbindungselementen 43, 44 in einer so weit nach rechts verschobenen Stellung, daß sich die Kolbenschieberteile 40, 41 rechts von den radialen Bohrungen 34, 38 befinden, so daß eine Verbindung vom Anschluß 9 zum Ausgang 11 über die Bohrung 34, den Ringraum um das Verbindungselement 43 und die Bohrung 36 sowie zwischen dem Eingang 20 und dem Anschluß 21 für die Flüssigkeitsableitung über die radiale Bohrung 37, den Ringraum um das Verbindungselement 44 und die radiale Bohrung 38 ergibt. In dieser Stellung kann das am Anschluß 9 eintretende Wasser ungehindert die Formen 11 durchströmen und gelangt zum Anschluß 21 zurück, von wo es entweder in einen Tank, in einen Abfluß oder im geschlossenen Kreislauf zurück zum Anschluß 9 geleitet wird.In the operating position, the piston slide parts 40, 41 with the connecting elements 43, 44 are in a position shifted so far to the right that the piston slide parts 40, 41 are located to the right of the radial bores 34, 38, so that a connection from the connection 9 to Output 11 via the bore 34, the annular space around the connecting element 43 and the bore 36 and between the inlet 20 and the connection 21 for the liquid drainage via the radial bore 37, the annular space around the connecting element 44 and the radial bore 38 results. In this position, the water entering port 9 can flow freely through molds 11 and returns to port 21, from where it is either returned to port 9 into a tank, into a drain or in a closed circuit.

Um das Wasser aus den Formen auszutreiben wird Druckluft über den Anschluß 10 zugeführt, indem der Kolbenschieber 40 bis 44 so weit nach links verschoben wird, daß sich eine Verbindung zwischen den radialen Bohrungen 35, 36 über den Ringraum im Bereich des Verbindungselements 43 sowie eine Verbindung zwischen den radialen Bohrungen 37, 39 über den Ringraum im Bereich des Verbindungselements 44 ergibt. Dabei wird die Flüssigkeit aus den Formen 1 mittels der über den Anschluß 10 zugeleiteten Druckluft ausgetrieben und fließt über den Ausgang 22 in den angedeuteten Auffangbehälter 23.In order to drive the water out of the molds, compressed air is supplied via the connection 10 by displacing the piston slide 40 to 44 to the left such that there is a connection between the radial bores 35, 36 via the annular space in the region of the connecting element 43 and a connection between the radial bores 37, 39 through the annular space in the area of the connecting element 44. The liquid is expelled from the molds 1 by means of the compressed air supplied via the connection 10 and flows via the outlet 22 into the indicated collecting container 23.

Die Funktionsweise des Ventils gemäß Fig. 7 ist somit dieselbe wie die der Ausführungsform entsprechend Fig. 1 bis 6.The operation of the valve according to FIG. 7 is thus the same as that of the embodiment according to FIGS. 1 to 6.

Claims (7)

  1. Device for selective application of one or several forms (1) for processing synthetic material with a liquid or a gas under pressure with
    - at least one pair of three-way valve elements (5, 6, 7, 48) with shut-off sections (12, 24; 40 to 44),
    - a connection (9) for supply of liquid and a pressurized-gas connection (10) and with an outlet (11), connected to an intake (2) of at least one form (1), on a first three-way valve element (5 or 7),
    - an intake (20) connected to an outlet (3) of at least one form (1), a connection (21) for an outlet for liquid and an outlet (22) for liquid and pressurized-gas on a second three-way valve element (6 and/or 48),
    wherein there is forced movement coupling of a shut-off section (12, 24, 40 to 44) of a pair of three-way valve elements (5, 6, 7, 48)
    - of a channel arrangement (13-17; 25-29; 34-39) in a valve housing (8, 19, 32) and a movable shut-off section (12, 24, 40-44) of both three-way valve elements (5, 6; 7, 48),
    - for a connection between a connection (9) for a liquid supply and an outlet (11) of a first three-way valve element (5, 7) connected to an intake (2) of a form (1) and, between an input (20) connected to an outlet (3) of a form (1) and a connection (21), for an outlet for liquid from a second three-way valve element (7, 48), in a first position of connected three-way valve elements (5, 6; 7, 48),
    - for a connection between a pressurized-gas connection (10) and an outlet (11) of a first three-way valve element (5, 7), connected to an intake (2) of a form (1) and also, between an inlet (20) connected to an outlet (3) of a form (1) and an outlet (22), for liquid and pressurized-gas of a second three-way valve element (7, 48) in a second position of connected three-way valve elements (5, 6; 7, 48) and
    - for a shut-off means of all connections, inlets and outlets (9, 10, 11; 20, 21, 22) and both three-way valve elements (5, 6; 7, 48) in a third position of both connected three-way valve elements (5, 6; 7, 48).
  2. Device in accordance with claim 1, wherein three-way valve elements (5, 6) have rotating shut-off sections (12, 24) which are connected to each other.
  3. Device in accordance with claim 2, wherein shut-off sections comprise coaxial wedge-shaped valves (12, 24).
  4. Device in accordance with claim 2 or 3, wherein there are valve housings (8, 19), for each shut-off section (12, 24), which are connected to each other.
  5. Device in accordance with claim 2 or 3, wherein there is a single-bodied valve-housing (32) for two shut-off sections (40-44).
  6. Device in accordance with claim 1, wherein there are sleeve valve elements (40-44) developed as shut-off sections.
  7. Device in accordance with claim 6, wherein sleeve valves (40-44) of both connected three-way valve elements (7, 48) are coaxially disposed.
EP93103035A 1992-03-30 1993-02-26 Device for selective connection of one or several moulds for plastics treatment with a fluid or a pressurised gas Expired - Lifetime EP0564800B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4210312 1992-03-30
DE4210312A DE4210312C2 (en) 1992-03-30 1992-03-30 Device for changing and optionally applying one or more molds for plastics processing with a liquid or a pressurized gas

Publications (2)

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EP0564800A1 EP0564800A1 (en) 1993-10-13
EP0564800B1 true EP0564800B1 (en) 1995-07-26

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US (1) US5437304A (en)
EP (1) EP0564800B1 (en)
DE (2) DE4210312C2 (en)

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Also Published As

Publication number Publication date
DE59300393D1 (en) 1995-08-31
DE4210312C2 (en) 1996-02-22
US5437304A (en) 1995-08-01
EP0564800A1 (en) 1993-10-13
DE4210312A1 (en) 1993-10-07

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